2009 Annual Report 1a.Objectives (from AD-416) To facilitate and conduct coordinated research into effects of agronomic land use on playa hydrology and ecology through collaborative efforts with Texas Tech University students and faculty. 1b.Approach (from AD-416) Modeling and direct measurement approaches will be used to conduct applied and fundamental research into plant ecology geomorphology and hydrology of playa wetlands and surronding watersheds. 3.Progress Report We continue finalizing the instrumentation of 30 playas across the Southern High Plains. One weather station was lost due to a 100-year rainfall event and subsequent flooding. My collaborators continue with data analysis of infiltration rates of playas as affected by proximate land use. We are in the process of constructing a weather station to check the assumptions in the models being used. The collaborators at Texas Tech continue to assist with the acquisition and installation of components for weather station maintenance. ADODR is in regular contact with cooperator via e-mail, phone, and face-to-face contacts.